update changelog

Signed-off-by: Gio <6011354+gioufop@users.noreply.github.com>

plugins/kubernetes-backend/CHANGELOG.md

@@ -17,7 +17,9 @@
 
   BREAKING: Kubernetes backend plugin now depends on CatalogApi
 
-  ```typescript
+  ```typescript  
+  // Import CatalogClient
+  import { CatalogClient } from '@backstage/catalog-client';
   // Create new CatalogClient
   const catalogApi = new CatalogClient({ discoveryApi: env.discovery });
   const { router } = await KubernetesBuilder.createBuilder({